Title :
A VCF Loss-Control Tuning Loop for$Q$-Enhanced LC Filters
Author :
S. Li;N. Stanic;Y. Tsividis
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY
Abstract :
A loss-control tuning loop for Q-enhanced LC filters based on a voltage-controlled filter (VCF) is presented. The main factors affecting the tuning accuracy in this tuning scheme, including mismatches and frequency tuning errors, are discussed. The tuning scheme was implemented for a 1.5-V, 6-GHz Q-enhanced LC filter on a UMC 0.18-mum standard CMOS process. The design and measurement results are given. Effective loss control of the filter over process tolerances is demonstrated
Keywords :
"Tuning","Voltage-controlled oscillators","Resonator filters","Q factor","Passive filters","Inductors","Circuit optimization","Voltage","Frequency locked loops","CMOS process"
Journal_Title :
IEEE Transactions on Circuits and Systems II: Express Briefs
DOI :
10.1109/TCSII.2006.877279
